"Chris Colefax" <chr### [at] tagpovrayorg> wrote:
> to find a spline's length, then, is probably sampling linear distances at
> steps along the spline.  Also, a rough approximation can be calculated
> using
> the bezier hull length.

Gleb <gk1### [at] sotonacuk> asked:
> Is it the same approximation method as mentioned in
> http://research.microsoft.com/~hollasch/cgindex/curves/cbezarclen.html  ?

Yes, the average of the linear length between the end points and the linear
length of the bezier hull is the approximation I've used (in fact, I believe
I discovered this at the same URL you posted).

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